Collserola and Besos River closed - Where do you bike these days?

Hey guys,

question goes out to all MTB and gravel bikers here: Where do you ride these days with Collserola and Besos river being closed due to the recent outbreak of swine fever? I was going to Mataro/Argentona on the road this weekend but would prefer gravel routes without all the cars and traffic. Is Serralada affected by the closings as well? I'm looking for appr. 60km loops that can be done after work during the week so preferably no routes that require train travel.

Thank you in advance!